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Forum discussion

NC-2009 EAp2:Minimum Energy Performance

DES for a combination of rated and non-rated building

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Bradley Felts
Atlantec Engineers
LEEDuser Basic Member
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I have a project that will be conditioned by a water-cooled chiller and boiler plant located in one of the building that will be rated. It also provides chilled and hot water to another building that is rated and one that will not be rated by LEED. I have seen references to looking a the campus application guide but can't find it on the USGBC website. I have reviewed the Treatment of District Thermal Energy for LEED v2009. Any help on how to model a virtual plant as prescribed by Option 2 Modeling section would be appreciated. I am using HAP 4.8.

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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
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Tue, 08/18/2015 - 13:31

Here is the Campus Guide - http://www.usgbc.org/resources/campus-guidance Perhaps you could come back with a more focused question.
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Bradley Felts
Atlantec Engineers
LEEDuser Basic Member
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Tue, 08/18/2015 - 17:04

Thanks for the response. Let's start here, If the plant equipment in my building serves other buildings do I need to treat the plant and model the systems in accordance with guidelines for DES?
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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
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Thu, 08/20/2015 - 14:24

The use of DESv2 is not required but it provides helpful guidance for how to model district systems.
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Bradley Felts
Atlantec Engineers
LEEDuser Basic Member
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Wed, 08/26/2015 - 19:35

When entering District Energy System into the EAp2 Section Table 1-4 xcell sheet do I stop at purchased chilled and hot water or do I enter the proposed chiller and boiler plants into the sheet and leave the base line blank? My model used Option #1 from the DESv2 guide.
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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
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Wed, 08/26/2015 - 19:44

Under Option 1 you enter the water side parameters that apply in both models. Neither model has a boiler or a chiller plant however. A pipe enters the building delivering hot and/or chilled water. You include all the system components downstream of that.

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